Dinand grune



UNITED STATES ATENT GUSTAV EDUAR'D FERDINAND GRUNE, or UN'rEnLi ss, rRUssIA, GERMANY.

PREPARING DYNAMITE.

SPECIFICATION forming part of Letters Patent No. 397,285, dated February 5, 1889.

Application filed December 12, 1887. Serial No. 257,695. (No specimens.) Patented in France February 1, 1887, No. 181,183; in Belgium June 9,188'7,N0. 77,768,2u1din England June 23, 1887,1Io. 8,970.

To all whom it may concern: covering, so that the danger of exudation of Be it known that I, GUSTAV EDUARD FER- the nitro-glycerine, inevitable with the kiesel- DINAND GRi'I NE, a subject of the King of guhr cartridges as hitherto made, is avoided, Prussia, residing at Unt-erluss, in the Kingand the liability of the nitroglycerine to 5 5 5 dom of Prussia, Germany, have invented new freeze in the cartridges is greatly reduced.

and useful Improvements in the Manufacture In order to manufacture the cartridges, the of Dynamite Cartridges, (for which I have kieselguhr is subjected to such pressure as is obtainedLetters Patentin France, No.181,183, requisite to bring it to the required shape, dated February 1, 1887 Belgium, No. 7 7,7 68, and it is heated to redness, so as to carbonize 6o 10 dated June 9, 1887, and England, No. 8,970, it. In making these cartridges of kieselguhr dated June 23, 1887,) of which the following they may be provided with a protective covis a specification. ering, even during carbonization, bynthe ad- In the manufacture of dynamite cartridges dition of a suit ble flux. The power of wawith kieselguhr (infusorial earth) and glycerter to expel the nitro-glycerine from the kieinc, it is a well-known fact that the glycerine selguhr cartridges is greatly reduced by using absorbed by the kieselguhr is very m'olently expelled again from the latter as soon as the kieselguhr with which has been combined carbon in one form or another. The combimixture, or a cartridge made therefrom, comes into contact with the water. This behavior nation may be formed by adding to the kieselguhr corresponding quantities of vegetable 7o 20 of the kieselguhr dynamite in the presence of or animal carbonsuch as soot, wood, charwater necessitates great precaution in storcoal, animal charcoal, blood, coal, and the ing it, and blasting or blowing up under walikeor by employing vegetable or animal ter by means of kieselguhr dynamite and the ramming of a loaded blast-hole with water substances-such as starch, sugar, cellulose, and the like, blood, glue,caseine, and the like- 7 5 2 5 are consequently rendered very difficult. These objections are overcome by my imcarbonized in kieselguhr which has been comproved method of manufacturing kieselguhr bined with said substances prior to the can bonization of the latter. The power of water dynamite cartridges, as hereinafter described, without reducing the absorbing capacity of toexpel the nitro-glycerine from the kieselguhr may be entirely and completely pre- 30 the kieselguhr, and without adding any substance which may diminish the explosive vented by using what is termed kieselguhr carbon, which is obtained by heating to redpower of the nitro-glycerine. Kieselguhr dynamite has heretofore been made by mixing ness, without access of air, kieselguhr in a nitro-glycerine with the loose kieselguhr unwashed or unwashed state, and mixing with it a large quantity of organic substances. 35 til saturated, this mixture being afterward molded by hand or by machinery into the The carbon surrounds and penetrates completely each single particle of the kieselguhr,

' form of plastic cartridges.

The main feature of my invention consists and gives so intimate a mixture of kieselguhr and the carbon as cannot be obtained by in the previous manufacture of consolidated mechanical means. The absorbent capacity 4 or compressed cartridges of kieselguhr, which of kieselguhr carbon is greatly superior to formed cartridges are carbonized and retain that of most kinds of kieselguhr. an absorbing capacity equal to that of the loose kieselguhr. These formed cart-ridges Kieselguhr dynamite made by my invention may be kept and transported under waare simply immersed in nitro-glycerine until saturated, in order to convert them into dyter without diminishing its explosive power.

namite, the advantage of this process being The congealing of the nitro-glycerine is impossible when the cartridges are transported that it obviates all the dangers hitherto attending the manufacture of dynamite carand kept in water having a temperature of tridges. These cartridges, after being confrom 30 to 60". Frozen cartridges may easily be thawed out in warm water without any 50 verted into dynamite by the absorption of nitro-glycerine, are enveloped in a water-proof danger.

Blasting under water without surrounding the cartridges with any case and the ram- In testimony WhereofIhave signed my name ning of the loaded blast-holes with Water, to this specification inthe presence of two subeven if they should stand for several days, are scribing Witnesses.

by this invention rendered possible.

5 I claim as my invention- GUSTA" EDUARI). FERDINAND GRUNE.

The herein-described method of manufacturing cartridges, consisting in pressing kie- Vitnesses: selguhr into the form of cartridges, then car- GUSTAV HI'JLSMANN, bonizing them, and finally saturating them B. ROI.

I o with nitro-glycerin e, substantially as set forth. 

